@get:JvmName("proxySelector")
  val proxySelector: ProxySelector =
    when {
      // Defer calls to ProxySelector.getDefault() because it can throw a SecurityException.
      builder.proxy != null -> NullProxySelector
      else -> builder.proxySelector ?: ProxySelector.getDefault() ?: NullProxySelector
    }

  @get:JvmName("proxyAuthenticator")
  val proxyAuthenticator: Authenticator =

      synchronized (mutex) {
        return delegate().get(key);
      }
    }

    @Override
    @CheckForNull
    public V getOrDefault(@CheckForNull Object key, @CheckForNull V defaultValue) {
      synchronized (mutex) {
        return delegate().getOrDefault(key, defaultValue);
      }
    }

    @Override
    public boolean isEmpty() {
      synchronized (mutex) {

    private CLIManager cliManager;

    private MessageBuilderFactory messageBuilderFactory;

    private FileSystem fileSystem = FileSystems.getDefault();

    private static final Pattern NEXT_LINE = Pattern.compile("\r?\n");

    public MavenCli() {
        this(null);
    }

                proxy = new Proxy(Type.HTTP, addr);
                if (StringUtil.isNotBlank(getHttpProxyUsername())) {
                    Authenticator.setDefault(new Authenticator() {
                        @Override
                        protected PasswordAuthentication getPasswordAuthentication() {

        }
    }

    protected void sendConfigFiles(final String index) {
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        configListMap.getOrDefault(index, Collections.emptyList()).forEach(path -> {
            String source = null;
            final String filePath = indexConfigPath + "/" + index + "/" + path;
            final String dictionaryPath;

  }

  public <T> void testNulls() {
    new NullPointerTester().testAllPublicStaticMethods(TypeToken.class);
    new NullPointerTester()
        .setDefault(TypeParameter.class, new TypeParameter<T>() {})
        .testAllPublicInstanceMethods(TypeToken.of(String.class));
  }

  private static class Assignability<From, To> {

    boolean isAssignable() {

    }
  }

  @AfterEach fun tearDown() {
//    TODO reenable after https://github.com/square/okhttp/issues/8206
//    fileSystem.checkNoOpenFiles()
    cache.close()

    java.net.Authenticator.setDefault(null)
  }

  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun get(
    protocol: Protocol,
    mockWebServer: MockWebServer,
  ) {
    setUp(protocol, mockWebServer)

  }

  public <T> void testNulls() {
    new NullPointerTester().testAllPublicStaticMethods(TypeToken.class);
    new NullPointerTester()
        .setDefault(TypeParameter.class, new TypeParameter<T>() {})
        .testAllPublicInstanceMethods(TypeToken.of(String.class));
  }

  private static class Assignability<From, To> {

    boolean isAssignable() {